Vehicle-tire.



J. A. SWINEHARTQ IULE TIRE.

APPLIOA TILED 1111.31, 1906.

902,926. Patented Nov. 3, 1908.

Q By July an /wag 2 7 1 of Ohio, have other side of the.

JAMES A. SWINEHART, OF AKRON, OHIO.

VEHICLE-TIRE.

Specification of Letter! Patent.

' Patented Nov. 8, 1908.

Application filed January 81, 1906. Serial No. 898,746.

To all whom it my concern:

Be it known that I, JAMES A. SWINEHABII,

-acitizen of the United States, residin in Akron, in the county of Summit and tate invented certain new and useful Im rovements inVehicle-Tires, of which the fol owing is a specification.

This invention has reference to improvements in vehicle tires formed of resilient material such as rubber, and which are substantially solid in cross section, dependin for the resiliency upon the compression 0 the tire between the rim of the wheel and the ground.

The object of the invention is to produce a form of tire to effectually prevent skidding or sidewise movement of the 'wheel; and to further increase the resilient eflect of the tire.

In the accompanying drawing, the figure represents in perspective a section of a. tire embodying my invention, with a rim applied thereto.

Thetire illustrated is denoted generally by A and at the ba C thereof is shown a mm B to which the tire may be secured in any suitable manner; the construction of the base portion of the tire forming no part of the present invention.

On the tread portion of the tire is provided at the middle' portion a groove D extending around the circumference of the tread. This groove is shown as concave or curved in section.

Ribs are rovided on the circumference of the tree portion at each side of the groove D. In the present instance, the tread 1S lin rical and arranged adjacent the groove D, the. adjacent portions of the groove and rib merging into an ogee curve. On the groove D is provided a convex or cylindrical rib N. The ad'acent rentrant. In the form shown portions of the rib N and groove also merging by an ogee curve. These ribs M and N do not extend to the side edge of the tread portion. The side faces of the tire are re is a concaved groove E formed on one si e of the tire and a similar groove F formed on the other side of the tire. Such grooves permit a greater compression of the tire at the middle transverse portion, the tire at the opposite edges of these grooves approaching under compression.

In the use of such tire, the ribs on each prises a solid elastic bod rovided with a rib M convex or cyside of the groove at the tread engage the ground prevent the side motion of the wheel. And this arran ement in combination with the concave si es, will give a greater resiliency to the tire, and prevent skidding.

From the foregoing the present improved clencher rim tire commade up of two by a solid neck tread section havportion will sections integrally unite ortion, one comprising a mg greater area in cross section than said neck portion, thereby to form a relatively flat tread having the construction hereinbefore described, and the other section comprising a rim section so arated from said tread section by a pair 0 circumferentially extendin grooves, the mass between said grooves orming the neck portion integrally uniting the rim and the tread section and enablin the tread section to be compressible relative y to the rim section. J

Having thus described my'invention, I claim:

1. The herein described tire comprising a solid elastic body having its sides curved inwardly at the tread and terminating at the base of a pair of annular ribs, one adjacent to each outer side of the tread, said ribs forming a centrally located annular concaved groove, the groove and ribs being of substantially the same area in cross section whereby the height of the ribs and the depth ofthe groove are substantially the same.

.2. The herein described tire comprising a solid elastic body consisting of a rim section and a tread section, having therebetween at each-"side an annular ooncaved recess, the sides of the tread section appreciabl projecting beyond the inner wa ls of suc concaved recesses whereby the resiliency of the tire is increased, the tread section having sides curved inwardly at the tread and terminating at the base of a air of annular ribs, one adjacent to each side of the tread, said ribs forming a centrally located annular concaved groove, the groove and ribs being of substantiall the same area in cross sec tion whereby t 1e height of the ribs and the depth of the groove are substantially the same.

- JAMES A. SWINEHART.

or pavement to effectually it will be seen that' 

